Hi Zlatko,

Here's the code for the thread procedure. I cannot see anything wrong in it,
but may be you (or other) will.

=============================================================
unsigned long CThreadApp::Thread()
{
        CoInitialize(NULL);

        // Register an interface in the GIT
        IGlobalInterfaceTable *piGIT=NULL;
        CoCreateInstance(CLSID_StdGlobalInterfaceTable, NULL,
                                        CLSCTX_INPROC_SERVER,
                                        IID_IGlobalInterfaceTable, (LPVOID*)&piGIT);
        IDummyComponent *piDummy=NULL;
        piGIT->GetInterfaceFromGlobal(m_cookie, __uuidof(piDummy),
(void**)&piDummy);

        // Sleep for a while
        Sleep(100);

        if (piDummy) { piDummy->Release();}
        piGIT->Release();

        CoUninitialize();

        return 0;
}

===========================================================
... and here is the main()

int main(int argc, char* argv[])
{
        CoInitialize(NULL);

        HRESULT hr=S_OK;
        CThreadApp app;

        // Create instance of dummy component
        IDummyComponent *piDummy=NULL;
        hr = CoCreateInstance(CLSID_DummyComponent, NULL, CLSCTX_INPROC_SERVER,
                                        IID_IDummyComponent, (void**)&piDummy);
        // Register an interface in the GIT
        IGlobalInterfaceTable *piGIT=NULL;
        DWORD cookie = 0;
        hr = CoCreateInstance(CLSID_StdGlobalInterfaceTable, NULL,
                                        CLSCTX_INPROC_SERVER,
                                        IID_IGlobalInterfaceTable, (LPVOID*)&piGIT);
        hr = piGIT->RegisterInterfaceInGlobal(piDummy, __uuidof(piDummy), &cookie);
        if (piDummy) piDummy->Release();

        // Start launching threads until key pressed
        cout << "Press any key to terminate..." << endl;
        while (!kbhit())
        {
                app.LaunchThread(cookie);

                MSG msg;
                while(PeekMessage(&msg,NULL,0,0,FALSE))
                {
                        GetMessage(&msg,NULL,0,0);
                        DispatchMessage(&msg);
                }
                Sleep(30);
        }

        cout << "Waiting for threads to terminate..." << endl;
        Sleep(3000); // Not too elegant, I know!

        piGIT->RevokeInterfaceFromGlobal(cookie);
        piGIT->Release();

        CoUninitialize();

        return 0;
}

==================================================================
==================================================================

-----Original Message-----
From: Zlatko Michailov

When you unmarshal from the GIT, you have a proxy created in your target
apartment. How proxies are implemented, I don't know but they use memory for
sure. The code of your ThreadProc might give us more information e.g. if you
initialize the new threads as STA, then you definitely force the COM
run-time to use your memory.

Zlatko

-----Original Message-----
From: Distributed COM-Based Code [mailto:DCOMDISCUSS.MICROSOFT.COM]On
Behalf Of Joan Ramon López Gillué
Sent: Friday, September 28, 2001 7:30 AM
To: DCOMDISCUSS.MICROSOFT.COM
Subject: leak in GetInterfaceFromGlobal

Hi all,

I'm getting a strange memory leak when using GetInterfaceFromGlobal from a
thread.

Basically what I do is:

1. CoCreate a dummy component "A" and get its "Ia" interface.

2. Register interface "Ia" in the GIT with RegisterInterfaceInGlobal

3. while (!_kbhit) {
        Create a thread which gets "Ia" from the GIT and then releases it.
        MessageLoop;
   }

====================================

When I execute the program the Task Manager shows how memory used by the
process raises
in blocks of 4Kb (sometimes 8Kb).

If I comment out the line where I call "GetInterfaceFromGlobal" (and nothing
else) the memory leak stops.

Any hint about what I can be doing wrong?

Thank a lot

----------------------------------------------------------------
Users Guide http://discuss.microsoft.com/archives/mailfaq.asp
contains important info. Save time, search the archives at
http://discuss.microsoft.com/archives/index.html .
To unsubscribe, mailto:DCOM-signoff-requestDISCUSS.MICROSOFT.COM

----------------------------------------------------------------
Users Guide http://discuss.microsoft.com/archives/mailfaq.asp
contains important info. Save time, search the archives at
http://discuss.microsoft.com/archives/index.html .
To unsubscribe, mailto:DCOM-signoff-requestDISCUSS.MICROSOFT.COM

----------------------------------------------------------------
Users Guide http://discuss.microsoft.com/archives/mailfaq.asp
contains important info. Save time, search the archives at
http://discuss.microsoft.com/archives/index.html .
To unsubscribe, mailto:DCOM-signoff-requestDISCUSS.MICROSOFT.COM

• Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]